# Services from delta-witness-api.ruphussten.workers.dev on Zero

> delta-witness-api.ruphussten.workers.dev serves 3 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/delta-witness-api.ruphussten.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/delta-witness-api.ruphussten.workers.dev/health.json

## Services

- [DELTA Witness Preflight Check](https://www.zero.xyz/c/delta-witness-preflight-check-294f3aee/llms.txt): $5/call via x402. Fetches a public URL, verifies its content against expected conditions, and returns a cryptographic proof bundle for machine-verifiable trust before an autonomous action
- [DELTA Witness — Web Capture & Proof Service](https://www.zero.xyz/c/delta-witness-web-capture-proof-service-4433f855/llms.txt): $1/call via x402. Captures a public webpage and returns a machine-verifiable cryptographic proof bundle with a tamper-evident hash and timestamped manifest.
- [DELTA Witness — Guarded Action Pilot](https://www.zero.xyz/c/delta-witness-guarded-action-pilot-e7833b0d/llms.txt): $10/call via x402. Fetches and cryptographically captures up to 3 public web pages, then runs preflight content checks (contains/excludes/hash assertions) before an autonomous agent takes action based on those sources.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)